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Online since: June 2014
Authors: Anna Gaviglio, Alberto Pirani, Mattia Bertocchi
We sampled farms and collected their data (from database, interviews, estimates, observations, tabulated data).
From the agricultural point of view, the literature identifies 3 main critical points of these areas: (i) they are often more valuable for development, thus farmers earn more by selling the land to developers as agriculture is still a low-profitability sector [2]; (ii) the fragmentation of farm area, inversely proportional to the distance from the city [3], involves the splitting of farm property into smaller units, reducing the efficiency of the enterprise; (iii) as a consequence of point 2, the reduction of the farm agricultural area also leads to a reduction of the economic size of farms [2].
We decided to use indicators, included in synthetic applications, useful for fast surveys, applicable to different and unrelated situations, based on data already available or easy to collect [5].
and the activities; (iii) creation of a database collecting the necessary data from SIARL, SITPAS “Sistema Informativo Territoriale Parco Agricolo Sud Milano”, from: www.provincia.mi.it/parcosud/sitpas/index.html , interviews (questionnaire) to farm personnel, observations and tabulated data (RICA “Rete di Informazione Contabile Agricola”, from: www.rica.inea.it/public/it/index.php ); (v) selection of the indicators; (iv) calculation of the indicators. 3.
Online since: July 2014
Authors: Srikanth Nerella, A.K. Jeevanantham, M. Ramalingam
The modeled Recliner was analyzed in LS Dyna to obtain the input data for fatigue calculations.
Seat Structure Damage due to fatigue causes reduction in life of the Recliner in general.
Fatigue Calculations Using Stress data obtained from the solver, the elastic and plastic data is extracted using the hardness of material.
The data is given in tabular form as follows.
Online since: May 2012
Authors: Ahmed Atta
A finite element model is studied and compared to experimental data.
To fully understand the capabilities of finite element computer software, one must look back to experimental data.
Data obtained from a finite element analysis package is not useful unless the necessary steps are taken to understand what is happening within the model that is created using the software.
For prestressing tendons, with a diameter of 13 mm, the bi-linear elasto-plastic material models can be used as well as the multi-linear isotropic model from the manufacturer’s data.
The last step was to define the load step until failure of the prestressed concrete beam, with consistency to the testing data.
Online since: July 2015
Authors: Thomas Böhlke, Fabian Buck, Barthel Brylka, Viktor Müller, Timo Müller, Andrew N. Hrymak, Frank Henning
The fiber orientation distributions as well as the mechanical properties are compared with micro-computed tomography data and results from three point bending tests performed by dynamical mechanical analysis (DMA), respectively.
The second-order fiber orientation tensor components for the examined µCT samples are plotted in Fig. 2, and in addition to the measured curves, the data is smoothed using a zero-phase digital filter.
The six scalar ARD-RSC model parameters (b1 · · · b5, κ) were fitted to the µCT fiber orientation data using the procedure of Phelps and Tucker III [6].
The parameters b3 and b5 are selected in the range of available literature values [6] and κ is used for data fitting.
The effective mechanical properties, calculated based on the mapped µCT fiber orientation data, is validated with the DMA three point bending tests in Fig. 5.
Online since: December 2013
Authors: Tegar Septyan, Boy Nurtjahyo
For data, it can be divided into several types: work design dimension and anthropometry data workers for designing the dimensions of an ergonomic workstation.
Data Input for Jack Software 2.1.1.
Anthropometric Data For anthropometric data of operators, sampling was conducted for 57 operators.
Table 1 shows anthropometric data of operators.
Data Input for WinQsb Data input for WinQsb based on service time and inter arrival time.
Online since: June 2011
Authors: Yong Xiang Leng, X. Gui, Y. Y. Su, S. Y. Li, H. Sun, J. Mei, N. Huang
The residual thermal stress reduction and adhesive strength increase of a-C:H films can be achieved by depositing the interlayer [1] or gradient layer [2].
Some research data have indicated that the structure and tribological properties of the films are affected by the substrate bias voltage.
Some research data have demonstrated that the reduction of the sp3 bonded content could result in a lower internal stress and hardness [13].
With increasing the bias voltage to -600V or -1000V, the graphitization of a-C:H films structure would be the main reason for the reduction of the hardness and internal stress of a-C:H films.
Online since: January 2014
Authors: Jia Jun Wang, Hong Da Zhang, Jun Wei Tao, Jin Bo Guo
So that load energy saving and reduction of exhaust can be achieved.
G-language system data acquisition program is shown in Fig. 3.
Torque, Catalyst before the temperature, Flow, Speed, Throttle opening, NGK,Air-fuel ratio Torque Speed Torque(Nm) Speed ,Air-fuel ratio Power(kW) Air flow temperature Air flow Throttle opening(%) Throttle opening ,NGK Air-fuel ratio , Catalyst before temperature Cylinder pressure sensor ,Air-fuel ratio Fig.3 G-language system data acquisition program.
The fuel consumption decreased caused by lean burn mainly due to the decrease of heat transfer losses and pyrolysis losses with the reduction of combustion temperature, oxygen-rich combustion is more fully, Pumped loss is reduced caused by increasing the throttle and so on.
When the air-fuel ratio continue to improve, HC is increasing, which is consistent with the phenomena of reduction of the combustion temperature, the combustion chamber wall quench layer getting thicken and combustion instability, and the increasing of cycle changes.
Online since: January 2005
Authors: Manoj Gupta, Maung Aye Thein, Narasimalu Srikanth
Using the XRD data, the crystalline size of the 10h-MMed samples was calculated using Sherrer equation [4] (see Table 1).
Comparison of their results shows that the damping capacity increases with the reduction in grain size of the material as we move from a micro-grain size to a nano-grain size sample.
In addition, the results also show that the increase in frequency results in a reduction in the damping capacity of the material.
This can be seen as increased hardness, from 202 HV for micro-grain size Ni sample, to 246 HV for the 10hMMed nano-grain sized Ni sample (see Table 1) which can be explained due to the presence of residual stress [8] as well as due to simultaneous reduction in grain size which can be explained by the Hall-Petch relation [1].
Under a sinusoidal loading, the average strain rate ε& depends on the strain amplitude aε and vibration frequency ωas follows [9]: zp 2 o f G dσ ε η ≈ πσ ∫� (2) 0.000 0.001 0.002 0.003 0.004 0.005300 400 500 600 700 800 900 1000 1100 Frequency (Hz) Damping Loss Factor Ni-10MMed sample Coarse Grain Ni Sample bθ∆ aθ∆ aγ∆ bγ∆ Increasing frequency Resonant point ωr Point b (ωb) Point a (ωa) Imaginary [α(ω)] Real [α(ω)] Fig. 1 (a) Typical receptance frequency response function (FRF) showing the natural frequency and two data points chosen to derive the damping factor and (b) variation of damping loss factor with vibration frequency.
Online since: July 2014
Authors: P. Veeramuthuvel, S. Jayaraman, M. Annadurai, A.K. Sharma, Krishnapillai Shankar
Introduction The mini satellite, like large complex satellite has many electronic packages from different functional areas such as power system, data handling, communication system, sensors, control electronics and bus management unit.
The various system realized in a single PCB card are then stacked one over the other and accommodated in the spacecraft structure thereby various advantages are achieved like, area, volumetric efficiency, reduction of mechanical hardware mass, reduction of intra, inter package harness, reduction of fabrication, integration and testing time.
[3] Thermal Property Measurement Section, Thermal Properties of Spacecraft Materials-Data Bank, Doc.
Online since: September 2016
Authors: Maxim G. Krinitcyn, Gennadii A. Pribytkov, Elena N. Korosteleva, Anton V. Baranovskii, Vladimir E. Strelnitskij, Victoria V. Korzhova
For phase identification and calculation of lattice parameters the ASTM X-ray data files and PDWin program were used.
According to our preliminary data, the oxygen content in the synthesis products reaches up to 5%.
It is known [10] that chromium is highly soluble in the titanium carbide cubic lattice and this result in the lattice parameter reduction.
It is necessary to determine the elemental composition of the carbide particles, to clarify the reasons of the lattice parameter reduction.
Reduction of titanium carbide particles size with increasing of steel binder content can be explained by well-known effect of reducing combustion temperature while thermally inert additives are introduced into reactive mixture.
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